Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Crystal L. Brogan"'
Autor:
Zachary T. P. Fried, Samer J. El-Abd, Brian M. Hays, Gabi Wenzel, Alex N. Byrne, Laurent Margulès, Roman A. Motiyenko, Steven T. Shipman, Maria P. Horne, Jes K. Jørgensen, Crystal L. Brogan, Todd R. Hunter, Anthony J. Remijan, Andrew Lipnicky, Ryan A. Loomis, Brett A. McGuire
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 2, p L23 (2024)
We use both chirped-pulse Fourier transform and frequency-modulated absorption spectroscopy to study the rotational spectrum of 2-methoxyethanol (CH _3 OCH _2 CH _2 OH) in several frequency regions ranging from 8.7 to 500 GHz. The resulting rotationa
Externí odkaz:
https://doaj.org/article/3df10404e1d541d093e23ac4f7eb84a8
Autor:
Brielle M. Shope, Samer J. El-Abd, Crystal L. Brogan, Todd R. Hunter, Eric R. Willis, Brett A. McGuire, Robin T. Garrod
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 146 (2024)
Gas-phase abundance ratios between C _2 H _4 O _2 isomers methyl formate (MF), glycolaldehyde (GA), and acetic acid (AA) are typically on the order of 100:10:1 in star-forming regions. However, an unexplained divergence from this neat relationship wa
Externí odkaz:
https://doaj.org/article/c2f3caa8a96c4e2dad68bd5d6566462b
Autor:
Samer J. El-Abd, Crystal L. Brogan, Todd R. Hunter, Kin Long Kelvin Lee, Ryan A. Loomis, Brett A. McGuire
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 1, p 14 (2024)
Much of the information gleaned from observations of star-forming regions comes from the analysis of their molecular emission spectra, particularly in the radio regime. The time-consuming nature of fitting synthetic spectra to observations interactiv
Externí odkaz:
https://doaj.org/article/03057ce7eef74b0daf417b66da5c8174
Autor:
Tomoya Hirota, Pawel Wolak, Todd R Hunter, Crystal L Brogan, Anna Bartkiewicz, Michal Durjasz, Agnieszka Kobak, Mateusz Olech, Marian Szymczak, Ross A Burns, Artis Aberfelds, Giseon Baek, Jan Brand, Shari Breen, Do-Young Byun, Alessio Caratti o Garatti, Xi Chen, James O Chibueze, Claudia Cyganowski, Jochen Eislöffel, Simon Ellingsen, Naomi Hirano, Bo Hu, Ji-hyun Kang, Jeong-Sook Kim, Jungha Kim, Kee-Tae Kim, Mi Kyoung Kim, Busaba Kramer, Jeong-Eun Lee, Hendrik Linz, Tie Liu, Gordon MacLeod, Tiege P McCarthy, Karl Menten, Kazuhito Motogi, Chung-Sik Oh, Gabor Orosz, Andrey M Sobolev, Bringfried Stecklum, Koichiro Sugiyama, Kazuyoshi Sunada, Lucero Uscanga, Fanie van den Heever, Alexandr E Volvach, Larisa N Volvach, Yuan Wei Wu, Yoshinori Yonekura
Publikováno v:
Publications of the Astronomical Society of Japan. 74:1234-1262
In 2019 September, a sudden flare of the 6.7 GHz methanol maser was observed toward the high-mass young stellar object (HMYSO) G24.33+0.14. This may represent the fourth detection of a transient mass accretion event in an HMYSO after S255IR NIRS3, NG
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3ce88fad60a73157c37cf5481e833cb
https://doi.org/10.1093/pasj/psac067
https://doi.org/10.1093/pasj/psac067
Autor:
M. Olech, B. Stecklum, A. M. Sobolev, Ross A. Burns, Todd R. Hunter, James O. Chibueze, Willem A. Baan, B. Kramer, Gabor Orosz, G. C. MacLeod, G. Surcis, S. P. van den Heever, Yoshinori Yonekura, Tomoya Hirota, Lucas J. Hyland, Crystal L. Brogan, H. Linz, Chris Phillips, Kee-Tae Kim, J. Eislöffel, Simon Ellingsen, A. Caratti o Garatti, Koichiro Sugiyama
High-mass stars are thought to accumulate much of their mass via short, infrequent bursts of disk-aided accretion. Such accretion events are rare and difficult to observe directly but are known to drive enhanced maser emission. In this Letter we repo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40beb0a4bb39e530416c91a7c5c81952
Autor:
Andrej M. Sobolev, Bringfried Stecklum, Xingwu Zheng, Crystal L. Brogan, Karl M. Menten, Bin Li, Xi Chen, G. C. MacLeod, Hendrik Linz, Todd R. Hunter, Willem A. Baan, Zhiyuan Ren, Y. Gong, Koichiro Sugiyama, Shari Breen, Simon Ellingsen, Sergey Parfenov, Zhi-Qiang Shen, Tomoya Hirota
Publikováno v:
Nature Astronomy. 4:1170-1176
Numerical simulations have predicted that substructures such as spiral arms can be produced through a gravitationally unstable disk around high-mass young stellar objects (HMYSOs). Recent high-resolution observations from the Atacama Large Millimeter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a02279997345268e6d65db914d25aeb
https://doi.org/10.1038/s41550-020-1144-x
https://doi.org/10.1038/s41550-020-1144-x
Autor:
J. M. D. Kruijssen, Crystal L. Brogan, Rowan J. Smith, Ian A. Bonnell, G. M. Williams, Claudia Cyganowski, P. Nazari, John D. Ilee, Todd R. Hunter
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 509(1), 748-762
Williams, G M, Cyganowski, C J, Brogan, C L, Hunter, T R, Ilee, J D, Nazari, P, Kruijssen, J M D, Smith, R & Bonnell, I A 2021, ' ALMA observations of the Extended Green Object G19.01–0.03: I. A Keplerian disc in a massive protostellar system ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stab2973
Williams, G M, Cyganowski, C J, Brogan, C L, Hunter, T R, Ilee, J D, Nazari, P, Kruijssen, J M D, Smith, R & Bonnell, I A 2021, ' ALMA observations of the Extended Green Object G19.01–0.03: I. A Keplerian disc in a massive protostellar system ', Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stab2973
Using the Atacama Large Millimetre/submillimeter Array (ALMA) and the Karl G. Jansky Very Large Array (VLA), we observed the Extended Green Object (EGO) G19.01$-$0.03 with sub-arcsecond resolution from 1.05 mm to 5.01 cm wavelengths. Our $\sim0.4''\s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e15426c710091dfcce658d1d0fc583c8
http://arxiv.org/abs/2110.06262
http://arxiv.org/abs/2110.06262
Autor:
A. P. M. Towner, Claudia Cyganowski, B. Stecklum, J. M. De Buizer, Brett A. McGuire, C. D. Dowell, Crystal L. Brogan, Samer El-Abd, G. C. MacLeod, Todd R. Hunter
In recent years, dramatic outbursts have been identified toward massive protostars via infrared and millimeter dust continuum and molecular maser emission. The longest lived outburst ($>6$ yr) persists in NGC6334I-MM1, a deeply-embedded object with n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::10a4d6b64995162bb2087e4d618d86d0
https://hdl.handle.net/10023/25272
https://hdl.handle.net/10023/25272
Autor:
Mark Gurwell, Hendrik Linz, J.L. Van der Walt, Claudia Cyganowski, C. Fischer, A. E. Volvach, Gabriele Surcis, Ross A. Burns, Andrej M. Sobolev, V. Wolf, J. Eislöffel, Sylvio Klose, O. Bayandina, Bringfried Stecklum, Crystal L. Brogan, Koichiro Sugiyama, A. Caratti o Garatti, G. C. MacLeod, Gabor Orosz, Yoshinori Yonekura, Kee-Tae Kim, S. Schmidl, Naomi Hirano, Karl M. Menten, M. Olech, Todd R. Hunter, T. K. Sridharan
Publikováno v:
Astron. Astrophys.
Astronomy and Astrophysics
Astronomy and Astrophysics
Class II methanol masers are signs of massive young stellar objects (MYSOs). Recent findings show that MYSO accretion bursts cause flares of these masers. Thus, maser monitoring can be used to identify such bursts. Burst-induced SED changes provide v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ad6b36513104ca34de9dae7b46d25686
https://research-repository.st-andrews.ac.uk/bitstream/10023/21284/1/2101.01812v1.pdf
https://research-repository.st-andrews.ac.uk/bitstream/10023/21284/1/2101.01812v1.pdf
Autor:
Crystal L. Brogan, Allison H. Costa, Amy E. Reines, Remy Indebetouw, Kelsey E. Johnson, Molly K. Finn
Henize 2-10 (He 2-10) is a nearby (D = 9 Mpc) starbursting blue compact dwarf galaxy that boasts a high star formation rate and a low luminosity AGN. He 2-10 is also one of the first galaxies in which embedded superstar clusters (SSCs) were discovere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d815aa0789e5d0cfce2620ca6416549c